Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
When is it recommended to use a self referencing rel "canonical"?
-
In what type of a situation is it the best type of practice to use a self referencing rel "canonical" tag?
Are there particular practices to be cautious of when using a self referencing rel "canonical" tag?
I see this practice used mainly with larger websites but I can't find any information that really explains when is a good time to make use of this practice for SEO purposes.
Appreciate all feedback.
Thank you in advance.
-
As others have said above, combating scrapers is a big reason, but you're relying on lazy scrapers not removing the tags.
Another reason is to prevent rogue content management systems from attaching unnecessary query strings to URLs, creating pages that can end up loading infinite times under different URLs. A canonical tag in the source file would mean that any number of duplicate pages point back to the original. The same reason goes for sites that have issues with redirecting www / non-www URLs to the correct version, or who deal with the same problem regarding secure / insecure URLs. In all these cases, the canonical tag is a bandaid, not a cure - it would be better to fix the underlying problem of the rogue CMS, incorrect redirection, etc. but the canonical tag (self-referencing) is there if you need it.
Google doesn't seem to have an issue with it, but if you're at all concerned about the other engines, use with care.
-
People do it to stop scarpers, but if your going to write screen scraper it would not be hard to remove canonical tags as well. so I don't think much of the idea.
Bing recommends that you do not use self ref canonicals tags. It could be that a self ref canonical tag may be followed as is alluded to by Bing, meaning that lose a bit of link juice thought the redirect.
-
You may want to just use it on every page.
One good argument for using a self-referencing rel=canonical on every page is to combat scrapers. If they grab the entire code, including the rel=canonical, they are essentially telling the bots that your page is the original, and they'll be much less likely to outrank you for your own content.
Larger sites tend to generate the rel=canonicals automatically for every page, and give you the option to customize it where necessary.
-
What do you mean?
Like on site.com/pagea.htm there is a canonical set to site.com/pagea.htm? No harm in that. You should have a canonical URL whenever you want only one specific version of a URL.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Can Google read content that is hidden under a "Read More" area?
For example, when a person first lands on a given page, they see a collapsed paragraph but if they want to gather more information they press the "read more" and it expands to reveal the full paragraph. Does Google crawl the full paragraph or just the shortened version? In the same vein, what if you have a text box that contains three different tabs. For example, you're selling a product that has a text box with overview, instructions & ingredients tabs all housed under the same URL. Does Google crawl all three tabs? Thanks for your insight!
Intermediate & Advanced SEO | | jlo76130 -
Using hreflang="en" instead of hreflang="en-gb"
Hello, I have a question in regard to international SEO and the hreflang meta tag. We are currently a B2B business in the UK. Our major market is England with some exceptions of sales internationally. We are wanting to increase our ranking into other english speaking countries and regions such as Ireland and the Channel Islands. My research has found regional google search engines for Ireland (google.ie), Jersey (google.je) and Guernsey (google.gg). Now, all the regions have English as one their main language and here is my questions. Because I use hreflang=“en-gb” as my site language, am I regional excluding these countries and islands? If I used hreflang=“en” would it include these english speaking regions and possible increase the ranking on these the regional search engines? Thank you,
Intermediate & Advanced SEO | | SilverStar11 -
Using a US CDN (Cloudflare) for a UK Site. Should I use a UK Based CDN as it says my server is based in USA
Hi All, We are a UK Company with Uk customers only and use CloudFlare CND. Our Site is hosted by a UK company with servers here but from looking online and checking where my site is hosted etc etc , some sites are telling me the name of our UK Hosted company and other sites are telling me my site is hosted in San Fran (USA) , where I presume the Cloudflare is based. I know Cloudflare has a couple of servers in the UK it uses but given all my customers are UK based ,I don't want this is affect rankings etc , as I thought it was a ranking benefit to be hosted in the country you are based. Is there any issue with this and should I change or is google clever enough to know so i shouldn't worry. thanks Pet
Intermediate & Advanced SEO | | PeteC120 -
Rel="self" and what to do with it?
Hey there Mozzers, Another question about a forum issue I encountered. When a forum thread has more than just one page as we all know the best course of action is to use rel="next" rel="prev" or rel="previous" But my forum automatically creates another line in the header called Rel="self" What that does is simple. If i have 3 pages http://www.example.com/article?story=abc1
Intermediate & Advanced SEO | | Angelos_Savvaidis
http://www.example.com/article?story=abc2
http://www.example.com/article?story=abc3 **instead of this ** On the first page, http://www.example.com/article?story=abc1 On the second page, http://www.example.com/article?story=abc2 On the third page, http://www.example.com/article?story=abc3: it creates this On the first page, http://www.example.com/article?story=abc1 So as you can see it creates a url by adding the ?page=1 and names it rel=self which actually gives back a duplicate page because now instead of just http://www.example.com/article?story=abc1 I also have the same page at http://www.example.com/article?story=abc1?page=1 Do i even need rel="self"? I thought that rel="next" and rel="prev" was enough? Should I change that?0 -
Dilemma about "images" folder in robots.txt
Hi, Hope you're doing well. I am sure, you guys must be aware that Google has updated their webmaster technical guidelines saying that users should allow access to their css files and java-scripts file if it's possible. Used to be that Google would render the web pages only text based. Now it claims that it can read the css and java-scripts. According to their own terms, not allowing access to the css files can result in sub-optimal rankings. "Disallowing crawling of Javascript or CSS files in your site’s robots.txt directly harms how well our algorithms render and index your content and can result in suboptimal rankings."http://googlewebmastercentral.blogspot.com/2014/10/updating-our-technical-webmaster.htmlWe have allowed access to our CSS files. and Google bot, is seeing our webapges more like a normal user would do. (tested it in GWT)Anyhow, this is my dilemma. I am sure lot of other users might be facing the same situation. Like any other e commerce companies/websites.. we have lot of images. Used to be that our css files were inside our images folder, so I have allowed access to that. Here's the robots.txt --> http://www.modbargains.com/robots.txtRight now we are blocking images folder, as it is very huge, very heavy, and some of the images are very high res. The reason we are blocking that is because we feel that Google bot might spend almost all of its time trying to crawl that "images" folder only, that it might not have enough time to crawl other important pages. Not to mention, a very heavy server load on Google's and ours. we do have good high quality original pictures. We feel that we are losing potential rankings since we are blocking images. I was thinking to allow ONLY google-image bot, access to it. But I still feel that google might spend lot of time doing that. **I was wondering if Google makes a decision saying, hey let me spend 10 minutes for google image bot, and let me spend 20 minutes for google-mobile bot etc.. or something like that.. , or does it have separate "time spending" allocations for all of it's bot types. I want to unblock the images folder, for now only the google image bot, but at the same time, I fear that it might drastically hamper indexing of our important pages, as I mentioned before, because of having tons & tons of images, and Google spending enough time already just to crawl that folder.**Any advice? recommendations? suggestions? technical guidance? Plan of action? Pretty sure I answered my own question, but I need a confirmation from an Expert, if I am right, saying that allow only Google image access to my images folder. Sincerely,Shaleen Shah
Intermediate & Advanced SEO | | Modbargains1 -
Brackets vs Encoded URLs: The "Same" in Google's eyes, or dup content?
Hello, This is the first time I've asked a question here, but I would really appreciate the advice of the community - thank you, thank you! Scenario: Internal linking is pointing to two different versions of a URL, one with brackets [] and the other version with the brackets encoded as %5B%5D Version 1: http://www.site.com/test?hello**[]=all&howdy[]=all&ciao[]=all
Intermediate & Advanced SEO | | mirabile
Version 2: http://www.site.com/test?hello%5B%5D**=all&howdy**%5B%5D**=all&ciao**%5B%5D**=all Question: Will search engines view these as duplicate content? Technically there is a difference in characters, but it's only because one version encodes the brackets, and the other does not (See: http://www.w3schools.com/tags/ref_urlencode.asp) We are asking the developer to encode ALL URLs because this seems cleaner but they are telling us that Google will see zero difference. We aren't sure if this is true, since engines can get so _hung up on even one single difference in character. _ We don't want to unnecessarily fracture the internal link structure of the site, so again - any feedback is welcome, thank you. 🙂0 -
Removing Dynamic "noindex" URL's from Index
6 months ago my clients site was overhauled and the user generated searches had an index tag on them. I switched that to noindex but didn't get it fast enough to avoid being 100's of pages indexed in Google. It's been months since switching to the noindex tag and the pages are still indexed. What would you recommend? Google crawls my site daily - but never the pages that I want removed from the index. I am trying to avoid submitting hundreds of these dynamic URL's to the removal tool in webmaster tools. Suggestions?
Intermediate & Advanced SEO | | BeTheBoss0 -
How Rel=Prev & Rel=Next work for me?
I have implemented Rel=Prev & Rel=Next tag on my website. I would like to give example URL to know more about it. http://www.vistapatioumbrellas.com/market-umbrellas?limit=40&p=3 http://www.vistapatioumbrellas.com/market-umbrellas?limit=40&p=4 http://www.vistapatioumbrellas.com/market-umbrellas?limit=40&p=5 Right now, I have blocked paginated pages by Robots.txt by following query. Disallow: /*?p= I have removed disallow syntax from Robots.txt for paginated pages. But, I have confusion with duplicate page title. If you will check all 3 pages so you will find out duplicate page title across all pages. I know that, duplicate page title is harmful for SEO. Will Google crawl + index all paginated pages? If yes so which page will get maximum benefits in organic ranking? Is there any specific way which may help me to solve this issue?
Intermediate & Advanced SEO | | CommercePundit0
